Fix unique ptrs in fpdfppo.cpp

fpdfsdk/fpdfsave_embeddertest.cpp

Index: fpdfsdk/fpdfsave_embeddertest.cpp
diff --git a/fpdfsdk/fpdfsave_embeddertest.cpp b/fpdfsdk/fpdfsave_embeddertest.cpp
index 55a58c2de3bcbec44ac47728dd6e133e8bcdf499..918727027fe1a12bfdbe761531e789a506fe180f 100644
--- a/fpdfsdk/fpdfsave_embeddertest.cpp
+++ b/fpdfsdk/fpdfsave_embeddertest.cpp
@@ -2,10 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "public/fpdf_save.h"
+
 #include <string.h>
 
 #include "core/fxcrt/fx_string.h"
-#include "public/fpdf_save.h"
+#include "public/fpdf_edit.h"
+#include "public/fpdf_ppo.h"
 #include "public/fpdfview.h"
 #include "testing/embedder_test.h"
 #include "testing/fx_string_testhelpers.h"
@@ -43,6 +46,21 @@ TEST_F(FPDFSaveEmbedderTest, SaveSimpleDocWithBadVersion) {
   EXPECT_THAT(GetString(), testing::StartsWith("%PDF-1.7\r\n"));
 }
 
+TEST_F(FPDFSaveEmbedderTest, SaveCopiedDoc) {
+  EXPECT_TRUE(OpenDocument("hello_world.pdf"));
+
+  FPDF_PAGE page = LoadPage(0);
+  EXPECT_TRUE(page);
+
+  FPDF_DOCUMENT output_doc = FPDF_CreateNewDocument();
+  EXPECT_TRUE(output_doc);
+  EXPECT_TRUE(FPDF_ImportPages(output_doc, document(), "1", 0));
+  EXPECT_TRUE(FPDF_SaveAsCopy(output_doc, this, 0));
+  FPDF_CloseDocument(output_doc);
+
+  UnloadPage(page);
+}
+
 TEST_F(FPDFSaveEmbedderTest, BUG_342) {
   EXPECT_TRUE(OpenDocument("hello_world.pdf"));
   EXPECT_TRUE(FPDF_SaveAsCopy(document(), this, 0));